1 files changed, 42 insertions, 0 deletions
diff --git a/lib/cStack.ml b/lib/cStack.ml
new file mode 100644
index 00000000..4acb2930
--- /dev/null
+++ b/lib/cStack.ml
@@ -0,0 +1,42 @@
+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2010     *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+exception Empty = Stack.Empty
+
+type 'a t = {
+  mutable stack : 'a list;
+}
+
+let create () = { stack = [] }
+
+let push x s = s.stack <- x :: s.stack
+
+let pop = function
+  | { stack = [] } -> raise Stack.Empty
+  | { stack = x::xs } as s -> s.stack <- xs; x
+
+let top = function
+  | { stack = [] } -> raise Stack.Empty
+  | { stack = x::_ } -> x
+
+let to_list { stack = s } = s
+
+let find f s = List.find f (to_list s)
+
+let find_map f s = CList.find_map f s.stack
+
+let fold_until f accu s = CList.fold_left_until f accu s.stack
+
+let is_empty { stack = s } = s = []
+
+let iter f { stack = s } = List.iter f s
+
+let clear s = s.stack <- []
+
+let length { stack = s } = List.length s
+